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Fast Daily Tools

Free AI, SEO, Finance, Solar & Developer tools — fast, secure, and private. Everything runs in your browser.

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No accounts, no paywalls, no dark patterns.

Popular tools

Most used across AI, Finance, Solar, Health, and SEO.

GPT Token Calculator

Estimate GPT tokens and API cost instantly.

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AI API Cost Calculator

Compare OpenAI, Claude, and Gemini API pricing.

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PayPal Fee Calculator

finance

Calculate PayPal fees for any transaction.

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Solar Panel Calculator

energy

Estimate solar system size, cost, savings & payback.

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Meta Tag Generator

seo

Generate SEO meta tags with live preview.

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JSON Formatter

developer

Format, validate, and minify JSON.

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Period Calculator

health

Predict your next period and fertile window.

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Pregnancy Due Date Calculator

health

Find your baby's due date and pregnancy week.

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Diet Plan Calculator

health

Calorie needs and macros for your goal.

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Browse by category

Nine vibrant categories, ready for daily use.

Calculators for LLM tokens, API costs, and AI model pricing.

Finance

Fee, tax, salary, and profit calculators for creators and sellers.

Energy

Solar, savings, and clean-energy payback calculators.

Health

Period, pregnancy, water intake, BMI and diet plan calculators.

SEO

Generators for meta tags, sitemaps, robots.txt, and schema markup.

Developer

Everyday utilities: JSON, Base64, UUID, and more.

Text

Word, character, and reading-time counters.

Image

Convert images between formats in your browser.

PDF

Merge and manipulate PDFs — coming soon.

Latest additions

Fresh tools shipped this month.

Solar Panel Calculator

energy

Estimate solar system size, cost, savings & payback.

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Word Counter

text

Count words, characters, and reading time.

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Image Converter

image

Convert between PNG, JPG, and WEBP.

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Period Calculator

health

Predict your next period and fertile window.

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Water Intake Calculator

health

How much water should you drink per day?

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From the blog

Guides for every tool — with real numbers.

Solar & Energy · 13 min

How Many Solar Panels Does a 3-Bedroom House Actually Need in 2026? (Free Calculator + Real Costs)

Health · 14 min

I'm Pregnant — When Is My Baby Actually Due? (Free 2026 Week-by-Week Calculator)

AI · 12 min

Claude Token Calculator: The 2026 Guide to Pricing Every Anthropic Model (Fable 5, Mythos, 4.8 & More)

Read all articles →